TP-Link TL-SG5412F, TL-SG5428 6.3.1 VPN Config

a port receives a packet, this port will replace the TPID value in the outer VLAN tag of this packet

with the user-defined value and then send the packet again. Thus, the VLAN-VPN packets sent to

the public network can be recognized by devices of other manufacturers.

The position of the TPID field in an Ethernet packet is the same as the position of the protocol type

field in the packet without VLAN Tag. Thus, to avoid confusion happening when the switch

forwards or receives a packet, you must not configure the following protocol type values listed in

the following table as the TPID value.

Protocol type Value

ARP 0x0806

IP 0x0800

MPLS 0x8847/0x8848

IPX 0x8137

IS-IS 0x8000

LACP 0x8809

802.1X 0x888E

Table 6-3 Values of Ethernet frame protocol type in common use

This VLAN VPN function is implemented on the VPN Config and Port Enable pages.

6.3.1 VPN Config

This page allows you to enable the VPN function, adjust the global TPID for VLAN-VPN packets

and enable the VPN up-link port. When VPN mode is enabled, the switch will add a tag to the

received tagged packet basing on the PVID of the received port..

Choose the menu VLAN→VLAN VPN→VPN Config to load the following page.

Figure 6-10 VPN Global Config

The following entries are displayed on this screen:

 Global Config

VPN Mode: Allows you to Enable/Disable the VLAN-VPN function.

Global TPID: Enter the global TPID (Tag protocol identifier).

 VPN Up-link Ports